/Engine/Plugins/Runtime/nDisplayModularFeatures/Source/DisplayClusterLightCardExtender/Public/StageActor/IDisplayClusterStageActor.h
The rotation used to orient the plane mesh used for the light card so that its normal points radially inwards
static const FRotator PlaneMeshRotation = FRotator(0.0f, -90.0f, 90.0f);